Check-valve.



y(2": J. IzILLGrl'lT & W. K. STBBBINS. CHECK VALVE.- APPIIOATION FILED IBB. 20, 1908.

Patented Mar. 16, 1909i .narran sTAfrns PATENT onirica.

CHARLES J. ZILLGITT AND WALTER K. STEBBINS, OF FAIRMOUNT, NORTH DAKOTA; SAID ZILLGITT ASSIGNOR TO SAID STEBBINS;

` GHECKNALVE..

Specication'of Letters Patent.

. x'ppucaan filed February 2o, 1908. serial No. 416,892. f

may come between the valve and its seat and prevent theproper closing of the valve; also to devise novel-means for grinding or truing the valve and seat to insure the formation of a tight joint, the construction being such as toadmit of the results aforesaid be ing accomplished without necessitating the removal of the check valve from the pipe line in which it may be fitted without disturbing. the'circulation or operation of the system or machine of which the check valve forms a art. i

For affull understanding of the invention and the merits thereof and also to acquire a vknowledge of the details of construction and the means for effecting the result, reference is to be hadto the following description and 'accompanying drawings.

, W'hilc the invention may be adapted to dili'ercnt forms 4and conditions by changes in the structure and vminor details without departing from the spirit or essentialfeatures thereof, still the preferred embodiment is shown in the *accompanying drawings, in which:

Figure l is a vertical, central longitudinal section of the check valve embodying the invention. Fig; 2 is a view similar to Fig. 1,

showing the stem depressed and in locking engagement with the' valve so as to rotatethc same upon its seat.

Fig. 3 is a detail perspective view-of the check valve. Fig.

4 is a detail perspective view of the i-nner or lower end f the stem, which is adapted to make interlocking.connection with the check valve.

Corwsponding and like parts are referred Io in the following description and indicated in all the views of the drawings 'by the same reference characters.

'lhe invention kis adapted to be applied .to chock valves of any type or'design, the valve illustrated being of well known construction fand comprising a casing 1 having seat 2 and valve 3 adapted to close upon` the seat 2. The valve casing 1 is provided in a side op osite to the seat 2 with an opening whic is surrounded by a collar 4 andto which a stuffing box 5 is fitted, preferably by means of a screw thread `joint so that said stufling box may be relmoved for any purpose, thereby admitting of access being had to the interior of the casing. A. projection 6 provided upon the upper side of the valve 3' is adapted to operate 'in the lower end of the stufling box -5 so as to guide thevalve in its movements and insure a square seating thereof. The

.valve is also directed in its movements by pendent lugs 7, which operate in the opening surrounded by thevalv'e seat 2. A stem 8. isfitted in the stuffing boxy and is adapted to move freely therein both longitudinally and rotatably and is provided at its outer end with a handle 9 and at its inner end with a head in which notches l1 are formed'to receive the wings of the projection 6 so as to interlock therewith when it is required to turn the valve 3 upon its seat 2, either to dislod e'any foreign matter or to grind the joint` etween the valve and its seat. A..

`spring 12 is mounted upon the projecting end of the stem 8 and ,is confined between the stuffing box 5 and the handle.)` and normally serves to hold the stem pressed upward and away from the valve so as not to interfere with the free workings thereof.

It will be understood rthat the invention may-be adapted to any check valve in use or in the market by siiln' ly fitting astufling box to a side of the va ve casing. and pro viding said stuffing .box with a spring actuated stem", which when depressed may be caused-to interlock with the valve so .as to^turn the same and dislodge any foreign mattei" that may have found its way between the valve and seat, or which will admit of the valve being trued or ground upon its seat' 'by turning the same ,back- Wardly and forwardly through the interventionpof the stem 8 and handle 9.

Having thus described the invention,

what is claimed as new is:l

In a device of the character set forth, the combination of a valve. casing having an inner seat `and an bpening in its side opposite to the seat, avalveadapted.to

close u pon` said seat and having an upper Patented March 16, 1909. V

g 915,64s y Winged projection, a stulling box fitted in l seat and e spring mounted upon the outer the openn of the valve easing and adapted end of the said stern and normally exerting to receive t 1e Winged projection of the valve outward pressure thereon.

and direct the latter in its reeiproeating l In testimony whereof We atx our signr;L movements, e stem mounted in' the stuffing l tures in presence of two Witnesses.

box toboth rotate and move longitudinally CHARLES J. ZILLGITT. [L s] therein and having a head at its lower end i WALTER K. STEBBINS. [L. s.] formed with notches adapted to receive Vitnesses:

and interlock with the said winged projec- J. J. Olas'rmon, 10 tron to admit of turnmg the valve upon-its Louis N. ABBOTT. 

